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trainer
noun
a
person
whose
job
is
to
teach
someone
a
skill
or
improve
their
physical
fitness
•
The
trainer
showed
the
new
employees
how
to
use
the
safety
equipment
.
The
trainer
showed
the
new
employees
how
to
use
the
safety
equipment
.
•
After
months
at
the
gym
,
her
trainer
said
she
could
lift
twice
her
original
weight
.
After
months
at
the
gym
,
her
trainer
said
she
could
lift
twice
her
original
weight
.
From
the
verb
“
train
”
+
“
-er
”,
first
recorded
in
the
late
16th
century
for
someone
who
teaches
others
.
noun
a
light
,
comfortable
shoe
designed
for
sport
or
casual
wear
•
He
slipped
on
his
trainers
and
went
for
a
run
in
the
park
.
He
slipped
on
his
trainers
and
went
for
a
run
in
the
park
.
•
These
white
trainers
match
almost
any
outfit
.
These
white
trainers
match
almost
any
outfit
.
Shortened
from
“
training
shoe
,”
first
used
in
British
English
in
the
1960s
.
noun
a
person
whose
job
is
to
teach
an
animal
to
behave
in
a
certain
way
or
perform
particular
tasks
•
The
dog
trainer
rewarded
the
puppy
with
treats
for
sitting
quietly
.
The
dog
trainer
rewarded
the
puppy
with
treats
for
sitting
quietly
.
•
A
famous
lion
trainer
performs
in
the
circus
every
weekend
.
A
famous
lion
trainer
performs
in
the
circus
every
weekend
.
Extension
of
the
human
sense
of
“
trainer
”
to
animals
in
the
19th
century
.
noun
an
aircraft
designed
for
teaching
pilots
the
basics
of
flying
•
The
cadet
flew
a
basic
trainer
before
moving
on
to
faster
jets
.
The
cadet
flew
a
basic
trainer
before
moving
on
to
faster
jets
.
•
Modern
flight
schools
use
twin-seat
trainers
equipped
with
advanced
avionics
.
Modern
flight
schools
use
twin-seat
trainers
equipped
with
advanced
avionics
.
First
recorded
in
aviation
in
the
early
20th
century
,
from
the
idea
of
a
plane
that
‘
trains
’
pilots
.